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llvm / llvm-project / eb1c2bdc1f55fbc5d1e7bb86e9f0e038b0f5adb7 / . / lldb / source / Plugins / ABI / MacOSX-i386 / ABIMacOSX_i386.cpp
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//===-- ABIMacOSX_i386.cpp --------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ABIMacOSX_i386.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/RegisterValue.h"
#include "lldb/Core/Scalar.h"
#include "lldb/Core/ValueObjectConstResult.h"
#include "lldb/Symbol/ClangASTContext.h"
#include "lldb/Symbol/UnwindPlan.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "llvm/ADT/Triple.h"
#include <vector>
using namespace lldb;
using namespace lldb_private;
static const char *pluginName = "ABIMacOSX_i386";
static const char *pluginDesc = "Mac OS X ABI for i386 targets";
static const char *pluginShort = "abi.macosx-i386";
enum
{
gcc_eax = 0,
gcc_ecx,
gcc_edx,
gcc_ebx,
gcc_ebp,
gcc_esp,
gcc_esi,
gcc_edi,
gcc_eip,
gcc_eflags
};
enum
{
dwarf_eax = 0,
dwarf_ecx,
dwarf_edx,
dwarf_ebx,
dwarf_esp,
dwarf_ebp,
dwarf_esi,
dwarf_edi,
dwarf_eip,
dwarf_eflags,
dwarf_stmm0 = 11,
dwarf_stmm1,
dwarf_stmm2,
dwarf_stmm3,
dwarf_stmm4,
dwarf_stmm5,
dwarf_stmm6,
dwarf_stmm7,
dwarf_xmm0 = 21,
dwarf_xmm1,
dwarf_xmm2,
dwarf_xmm3,
dwarf_xmm4,
dwarf_xmm5,
dwarf_xmm6,
dwarf_xmm7,
dwarf_ymm0 = dwarf_xmm0,
dwarf_ymm1 = dwarf_xmm1,
dwarf_ymm2 = dwarf_xmm2,
dwarf_ymm3 = dwarf_xmm3,
dwarf_ymm4 = dwarf_xmm4,
dwarf_ymm5 = dwarf_xmm5,
dwarf_ymm6 = dwarf_xmm6,
dwarf_ymm7 = dwarf_xmm7
};
enum
{
gdb_eax = 0,
gdb_ecx = 1,
gdb_edx = 2,
gdb_ebx = 3,
gdb_esp = 4,
gdb_ebp = 5,
gdb_esi = 6,
gdb_edi = 7,
gdb_eip = 8,
gdb_eflags = 9,
gdb_cs = 10,
gdb_ss = 11,
gdb_ds = 12,
gdb_es = 13,
gdb_fs = 14,
gdb_gs = 15,
gdb_stmm0 = 16,
gdb_stmm1 = 17,
gdb_stmm2 = 18,
gdb_stmm3 = 19,
gdb_stmm4 = 20,
gdb_stmm5 = 21,
gdb_stmm6 = 22,
gdb_stmm7 = 23,
gdb_fctrl = 24, gdb_fcw = gdb_fctrl,
gdb_fstat = 25, gdb_fsw = gdb_fstat,
gdb_ftag = 26, gdb_ftw = gdb_ftag,
gdb_fiseg = 27, gdb_fpu_cs = gdb_fiseg,
gdb_fioff = 28, gdb_ip = gdb_fioff,
gdb_foseg = 29, gdb_fpu_ds = gdb_foseg,
gdb_fooff = 30, gdb_dp = gdb_fooff,
gdb_fop = 31,
gdb_xmm0 = 32,
gdb_xmm1 = 33,
gdb_xmm2 = 34,
gdb_xmm3 = 35,
gdb_xmm4 = 36,
gdb_xmm5 = 37,
gdb_xmm6 = 38,
gdb_xmm7 = 39,
gdb_mxcsr = 40,
gdb_mm0 = 41,
gdb_mm1 = 42,
gdb_mm2 = 43,
gdb_mm3 = 44,
gdb_mm4 = 45,
gdb_mm5 = 46,
gdb_mm6 = 47,
gdb_mm7 = 48,
gdb_ymm0 = gdb_xmm0,
gdb_ymm1 = gdb_xmm1,
gdb_ymm2 = gdb_xmm2,
gdb_ymm3 = gdb_xmm3,
gdb_ymm4 = gdb_xmm4,
gdb_ymm5 = gdb_xmm5,
gdb_ymm6 = gdb_xmm6,
gdb_ymm7 = gdb_xmm7
};
static RegisterInfo g_register_infos[] =
{
// NAME ALT SZ OFF ENCODING FORMAT COMPILER DWARF GENERIC GDB LLDB NATIVE VALUE REGS INVALIDATE REGS
// ====== ======= == === ============= ============ ===================== ===================== ============================ ==================== ====================== ========== ===============
{ "eax", NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_eax , dwarf_eax , LLDB_INVALID_REGNUM , gdb_eax , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ebx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_ebx , dwarf_ebx , LLDB_INVALID_REGNUM , gdb_ebx , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ecx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_ecx , dwarf_ecx , LLDB_REGNUM_GENERIC_ARG4 , gdb_ecx , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "edx" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_edx , dwarf_edx , LLDB_REGNUM_GENERIC_ARG3 , gdb_edx , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "esi" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_esi , dwarf_esi , LLDB_REGNUM_GENERIC_ARG2 , gdb_esi , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "edi" , NULL, 4, 0, eEncodingUint , eFormatHex , { gcc_edi , dwarf_edi , LLDB_REGNUM_GENERIC_ARG1 , gdb_edi , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ebp" , "fp", 4, 0, eEncodingUint , eFormatHex , { gcc_ebp , dwarf_ebp , LLDB_REGNUM_GENERIC_FP , gdb_ebp , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "esp" , "sp", 4, 0, eEncodingUint , eFormatHex , { gcc_esp , dwarf_esp , LLDB_REGNUM_GENERIC_SP , gdb_esp , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "eip" , "pc", 4, 0, eEncodingUint , eFormatHex , { gcc_eip , dwarf_eip , LLDB_REGNUM_GENERIC_PC , gdb_eip , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "eflags", NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_REGNUM_GENERIC_FLAGS , gdb_eflags , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "cs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_cs , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ss" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ss , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ds" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ds , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "es" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_es , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fs , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "gs" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_gs , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm0" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm0 , LLDB_INVALID_REGNUM , gdb_stmm0 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm1" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm1 , LLDB_INVALID_REGNUM , gdb_stmm1 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm2" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm2 , LLDB_INVALID_REGNUM , gdb_stmm2 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm3" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm3 , LLDB_INVALID_REGNUM , gdb_stmm3 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm4" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm4 , LLDB_INVALID_REGNUM , gdb_stmm4 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm5" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm5 , LLDB_INVALID_REGNUM , gdb_stmm5 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm6" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm6 , LLDB_INVALID_REGNUM , gdb_stmm6 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "stmm7" , NULL, 10, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_stmm7 , LLDB_INVALID_REGNUM , gdb_stmm7 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fctrl" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fctrl , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fstat" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fstat , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ftag" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_ftag , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fiseg" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fiseg , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fioff" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fioff , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "foseg" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_foseg , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fooff" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fooff , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "fop" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_fop , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm0" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm0 , LLDB_INVALID_REGNUM , gdb_xmm0 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm1" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm1 , LLDB_INVALID_REGNUM , gdb_xmm1 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm2" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm2 , LLDB_INVALID_REGNUM , gdb_xmm2 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm3" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm3 , LLDB_INVALID_REGNUM , gdb_xmm3 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm4" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm4 , LLDB_INVALID_REGNUM , gdb_xmm4 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm5" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm5 , LLDB_INVALID_REGNUM , gdb_xmm5 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm6" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm6 , LLDB_INVALID_REGNUM , gdb_xmm6 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "xmm7" , NULL, 16, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_xmm7 , LLDB_INVALID_REGNUM , gdb_xmm7 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "mxcsr" , NULL, 4, 0, eEncodingUint , eFormatHex , { LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , LLDB_INVALID_REGNUM , gdb_mxcsr , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm0" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm0 , LLDB_INVALID_REGNUM , gdb_ymm0 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm1" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm1 , LLDB_INVALID_REGNUM , gdb_ymm1 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm2" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm2 , LLDB_INVALID_REGNUM , gdb_ymm2 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm3" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm3 , LLDB_INVALID_REGNUM , gdb_ymm3 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm4" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm4 , LLDB_INVALID_REGNUM , gdb_ymm4 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm5" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm5 , LLDB_INVALID_REGNUM , gdb_ymm5 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm6" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm6 , LLDB_INVALID_REGNUM , gdb_ymm6 , LLDB_INVALID_REGNUM }, NULL, NULL},
{ "ymm7" , NULL, 32, 0, eEncodingVector, eFormatVectorOfUInt8, { LLDB_INVALID_REGNUM , dwarf_ymm7 , LLDB_INVALID_REGNUM , gdb_ymm7 , LLDB_INVALID_REGNUM }, NULL, NULL}
};
static const uint32_t k_num_register_infos = sizeof(g_register_infos)/sizeof(RegisterInfo);
static bool g_register_info_names_constified = false;
const lldb_private::RegisterInfo *
ABIMacOSX_i386::GetRegisterInfoArray (uint32_t &count)
{
// Make the C-string names and alt_names for the register infos into const
// C-string values by having the ConstString unique the names in the global
// constant C-string pool.
if (!g_register_info_names_constified)
{
g_register_info_names_constified = true;
for (uint32_t i=0; i<k_num_register_infos; ++i)
{
if (g_register_infos[i].name)
g_register_infos[i].name = ConstString(g_register_infos[i].name).GetCString();
if (g_register_infos[i].alt_name)
g_register_infos[i].alt_name = ConstString(g_register_infos[i].alt_name).GetCString();
}
}
count = k_num_register_infos;
return g_register_infos;
}
size_t
ABIMacOSX_i386::GetRedZoneSize () const
{
return 0;
}
//------------------------------------------------------------------
// Static Functions
//------------------------------------------------------------------
ABISP
ABIMacOSX_i386::CreateInstance (const ArchSpec &arch)
{
static ABISP g_abi_sp;
if (arch.GetTriple().getArch() == llvm::Triple::x86)
{
if (!g_abi_sp)
g_abi_sp.reset (new ABIMacOSX_i386);
return g_abi_sp;
}
return ABISP();
}
bool
ABIMacOSX_i386::PrepareTrivialCall (Thread &thread,
addr_t sp,
addr_t func_addr,
addr_t return_addr,
addr_t *arg1_ptr,
addr_t *arg2_ptr,
addr_t *arg3_ptr,
addr_t *arg4_ptr,
addr_t *arg5_ptr,
addr_t *arg6_ptr) const
{
RegisterContext *reg_ctx = thread.GetRegisterContext().get();
if (!reg_ctx)
return false;
uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
// When writing a register value down to memory, the register info used
// to write memory just needs to have the correct size of a 32 bit register,
// the actual register it pertains to is not important, just the size needs
// to be correct. Here we use "eax"...
const RegisterInfo *reg_info_32 = reg_ctx->GetRegisterInfoByName("eax");
// Make room for the argument(s) on the stack
Error error;
RegisterValue reg_value;
// Write any arguments onto the stack
if (arg1_ptr)
{
sp -= 4;
if (arg2_ptr)
{
sp -= 4;
if (arg3_ptr)
{
sp -= 4;
if (arg4_ptr)
{
sp -= 4;
if (arg5_ptr)
{
sp -= 4;
if (arg6_ptr)
{
sp -= 4;
}
}
}
}
}
}
// Align the SP
sp &= ~(16ull-1ull); // 16-byte alignment
if (arg1_ptr)
{
reg_value.SetUInt32(*arg1_ptr);
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
if (arg2_ptr)
{
reg_value.SetUInt32(*arg2_ptr);
// The register info used to write memory just needs to have the correct
// size of a 32 bit register, the actual register it pertains to is not
// important, just the size needs to be correct. Here we use "eax"...
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp + 4,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
if (arg3_ptr)
{
reg_value.SetUInt32(*arg3_ptr);
// The register info used to write memory just needs to have the correct
// size of a 32 bit register, the actual register it pertains to is not
// important, just the size needs to be correct. Here we use "eax"...
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp + 8,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
if (arg4_ptr)
{
reg_value.SetUInt32(*arg4_ptr);
// The register info used to write memory just needs to have the correct
// size of a 32 bit register, the actual register it pertains to is not
// important, just the size needs to be correct. Here we use "eax"...
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp + 12,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
if (arg5_ptr)
{
reg_value.SetUInt32(*arg5_ptr);
// The register info used to write memory just needs to have the correct
// size of a 32 bit register, the actual register it pertains to is not
// important, just the size needs to be correct. Here we use "eax"...
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp + 16,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
if (arg6_ptr)
{
reg_value.SetUInt32(*arg6_ptr);
// The register info used to write memory just needs to have the correct
// size of a 32 bit register, the actual register it pertains to is not
// important, just the size needs to be correct. Here we use "eax"...
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp + 20,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
}
}
}
}
}
}
// The return address is pushed onto the stack (yes after we just set the
// alignment above!).
sp -= 4;
reg_value.SetUInt32(return_addr);
error = reg_ctx->WriteRegisterValueToMemory (reg_info_32,
sp,
reg_info_32->byte_size,
reg_value);
if (error.Fail())
return false;
// %esp is set to the actual stack value.
if (!reg_ctx->WriteRegisterFromUnsigned (sp_reg_num, sp))
return false;
// %eip is set to the address of the called function.
if (!reg_ctx->WriteRegisterFromUnsigned (pc_reg_num, func_addr))
return false;
return true;
}
bool
ABIMacOSX_i386::PrepareNormalCall (Thread &thread,
addr_t sp,
addr_t func_addr,
addr_t return_addr,
ValueList &args) const
{
ExecutionContext exe_ctx (thread.shared_from_this());
RegisterContext *reg_ctx = thread.GetRegisterContext().get();
if (!reg_ctx)
return false;
Process *process = exe_ctx.GetProcessPtr();
Error error;
uint32_t fp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_FP);
uint32_t pc_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC);
uint32_t sp_reg_num = reg_ctx->ConvertRegisterKindToRegisterNumber (eRegisterKindGeneric, LLDB_REGNUM_GENERIC_SP);
// Do the argument layout
std::vector <uint32_t> argLayout; // 4-byte chunks, as discussed in the ABI Function Call Guide
size_t numArgs = args.GetSize();
size_t index;
for (index = 0; index < numArgs; ++index)
{
Value *val = args.GetValueAtIndex(index);
if (!val)
return false;
switch (val->GetValueType())
{
case Value::eValueTypeScalar:
{
Scalar &scalar = val->GetScalar();
switch (scalar.GetType())
{
case Scalar::e_void:
default:
return false;
case Scalar::e_sint:
case Scalar::e_uint:
case Scalar::e_slong:
case Scalar::e_ulong:
case Scalar::e_slonglong:
case Scalar::e_ulonglong:
{
uint64_t data = scalar.ULongLong();
switch (scalar.GetByteSize())
{
default:
return false;
case 1:
argLayout.push_back((uint32_t)(data & 0xffull));
break;
case 2:
argLayout.push_back((uint32_t)(data & 0xffffull));
break;
case 4:
argLayout.push_back((uint32_t)(data & 0xffffffffull));
break;
case 8:
argLayout.push_back((uint32_t)(data & 0xffffffffull));
argLayout.push_back((uint32_t)(data >> 32));
break;
}
}
break;
case Scalar::e_float:
{
float data = scalar.Float();
uint32_t dataRaw = *((uint32_t*)(&data));
argLayout.push_back(dataRaw);
}
break;
case Scalar::e_double:
{
double data = scalar.Double();
uint32_t *dataRaw = ((uint32_t*)(&data));
argLayout.push_back(dataRaw[0]);
argLayout.push_back(dataRaw[1]);
}
break;
case Scalar::e_long_double:
{
long double data = scalar.Double();
uint32_t *dataRaw = ((uint32_t*)(&data));
while ((argLayout.size() * 4) & 0xf)
argLayout.push_back(0);
argLayout.push_back(dataRaw[0]);
argLayout.push_back(dataRaw[1]);
argLayout.push_back(dataRaw[2]);
argLayout.push_back(dataRaw[3]);
}
break;
}
}
break;
case Value::eValueTypeHostAddress:
switch (val->GetContextType())
{
default:
return false;
case Value::eContextTypeClangType:
{
void *val_type = val->GetClangType();
uint32_t cstr_length;
if (ClangASTContext::IsCStringType (val_type, cstr_length))
{
const char *cstr = (const char*)val->GetScalar().ULongLong();
cstr_length = strlen(cstr);
// Push the string onto the stack immediately.
sp -= (cstr_length + 1);
if (process->WriteMemory(sp, cstr, cstr_length + 1, error) != (cstr_length + 1))
return false;
// Put the address of the string into the argument array.
argLayout.push_back((uint32_t)(sp & 0xffffffff));
}
else
{
return false;
}
}
break;
}
break;
case Value::eValueTypeFileAddress:
case Value::eValueTypeLoadAddress:
default:
return false;
}
}
// Make room for the arguments on the stack
sp -= 4 * argLayout.size();
// Align the SP
sp &= ~(16ull-1ull); // 16-byte alignment
// Write the arguments on the stack
size_t numChunks = argLayout.size();
for (index = 0; index < numChunks; ++index)
if (process->WriteMemory(sp + (index * 4), &argLayout[index], sizeof(uint32_t), error) != sizeof(uint32_t))
return false;
// The return address is pushed onto the stack.
sp -= 4;
uint32_t returnAddressU32 = return_addr;
if (process->WriteMemory (sp, &returnAddressU32, sizeof(returnAddressU32), error) != sizeof(returnAddressU32))
return false;
// %esp is set to the actual stack value.
if (!reg_ctx->WriteRegisterFromUnsigned(sp_reg_num, sp))
return false;
// %ebp is set to a fake value, in our case 0x0x00000000
if (!reg_ctx->WriteRegisterFromUnsigned(fp_reg_num, 0x00000000))
return false;
// %eip is set to the address of the called function.
if (!reg_ctx->WriteRegisterFromUnsigned(pc_reg_num, func_addr))
return false;
return true;
}
static bool
ReadIntegerArgument (Scalar &scalar,
unsigned int bit_width,
bool is_signed,
Process *process,
addr_t &current_stack_argument)
{
uint32_t byte_size = (bit_width + (8-1))/8;
Error error;
if (process->ReadScalarIntegerFromMemory(current_stack_argument, byte_size, is_signed, scalar, error))
{
current_stack_argument += byte_size;
return true;
}
return false;
}
bool
ABIMacOSX_i386::GetArgumentValues (Thread &thread,
ValueList &values) const
{
unsigned int num_values = values.GetSize();
unsigned int value_index;
// Extract the Clang AST context from the PC so that we can figure out type
// sizes
clang::ASTContext *ast_context = thread.CalculateTarget()->GetScratchClangASTContext()->getASTContext();
// Get the pointer to the first stack argument so we have a place to start
// when reading data
RegisterContext *reg_ctx = thread.GetRegisterContext().get();
if (!reg_ctx)
return false;
addr_t sp = reg_ctx->GetSP(0);
if (!sp)
return false;
addr_t current_stack_argument = sp + 4; // jump over return address
for (value_index = 0;
value_index < num_values;
++value_index)
{
Value *value = values.GetValueAtIndex(value_index);
if (!value)
return false;
// We currently only support extracting values with Clang QualTypes.
// Do we care about others?
switch (value->GetContextType())
{
default:
return false;
case Value::eContextTypeClangType:
{
void *value_type = value->GetClangType();
bool is_signed;
if (ClangASTContext::IsIntegerType (value_type, is_signed))
{
size_t bit_width = ClangASTType::GetClangTypeBitWidth(ast_context, value_type);
ReadIntegerArgument(value->GetScalar(),
bit_width,
is_signed,
thread.GetProcess().get(),
current_stack_argument);
}
else if (ClangASTContext::IsPointerType (value_type))
{
ReadIntegerArgument(value->GetScalar(),
32,
false,
thread.GetProcess().get(),
current_stack_argument);
}
}
break;
}
}
return true;
}
ValueObjectSP
ABIMacOSX_i386::GetReturnValueObjectImpl (Thread &thread,
ClangASTType &ast_type) const
{
Value value;
ValueObjectSP return_valobj_sp;
void *value_type = ast_type.GetOpaqueQualType();
if (!value_type)
return return_valobj_sp;
clang::ASTContext *ast_context = ast_type.GetASTContext();
if (!ast_context)
return return_valobj_sp;
value.SetContext (Value::eContextTypeClangType, value_type);
RegisterContext *reg_ctx = thread.GetRegisterContext().get();
if (!reg_ctx)
return return_valobj_sp;
bool is_signed;
if (ClangASTContext::IsIntegerType (value_type, is_signed))
{
size_t bit_width = ClangASTType::GetClangTypeBitWidth(ast_context, value_type);
unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB];
unsigned edx_id = reg_ctx->GetRegisterInfoByName("edx", 0)->kinds[eRegisterKindLLDB];
switch (bit_width)
{
default:
case 128:
// Scalar can't hold 128-bit literals, so we don't handle this
return return_valobj_sp;
case 64:
uint64_t raw_value;
raw_value = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff;
raw_value |= (thread.GetRegisterContext()->ReadRegisterAsUnsigned(edx_id, 0) & 0xffffffff) << 32;
if (is_signed)
value.GetScalar() = (int64_t)raw_value;
else
value.GetScalar() = (uint64_t)raw_value;
break;
case 32:
if (is_signed)
value.GetScalar() = (int32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff);
else
value.GetScalar() = (uint32_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff);
break;
case 16:
if (is_signed)
value.GetScalar() = (int16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff);
else
value.GetScalar() = (uint16_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffff);
break;
case 8:
if (is_signed)
value.GetScalar() = (int8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff);
else
value.GetScalar() = (uint8_t)(thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xff);
break;
}
}
else if (ClangASTContext::IsPointerType (value_type))
{
unsigned eax_id = reg_ctx->GetRegisterInfoByName("eax", 0)->kinds[eRegisterKindLLDB];
uint32_t ptr = thread.GetRegisterContext()->ReadRegisterAsUnsigned(eax_id, 0) & 0xffffffff;
value.GetScalar() = ptr;
}
else
{
// not handled yet
return return_valobj_sp;
}
// If we get here, we have a valid Value, so make our ValueObject out of it:
return_valobj_sp = ValueObjectConstResult::Create(
thread.GetStackFrameAtIndex(0).get(),
ast_type.GetASTContext(),
value,
ConstString(""));
return return_valobj_sp;
}
bool
ABIMacOSX_i386::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan)
{
uint32_t reg_kind = unwind_plan.GetRegisterKind();
uint32_t sp_reg_num = LLDB_INVALID_REGNUM;
uint32_t pc_reg_num = LLDB_INVALID_REGNUM;
switch (reg_kind)
{
case eRegisterKindDWARF:
sp_reg_num = dwarf_esp;
pc_reg_num = dwarf_eip;
break;
case eRegisterKindGCC:
sp_reg_num = gcc_esp;
pc_reg_num = gcc_eip;
break;
case eRegisterKindGDB:
sp_reg_num = gdb_esp;
pc_reg_num = gdb_eip;
break;
case eRegisterKindGeneric:
sp_reg_num = LLDB_REGNUM_GENERIC_SP;
pc_reg_num = LLDB_REGNUM_GENERIC_PC;
break;
}
if (sp_reg_num == LLDB_INVALID_REGNUM ||
pc_reg_num == LLDB_INVALID_REGNUM)
return false;
UnwindPlan::Row row;
row.SetCFARegister (sp_reg_num);
row.SetCFAOffset (4);
row.SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -4, false);
unwind_plan.AppendRow (row);
unwind_plan.SetSourceName ("i386 at-func-entry default");
return true;
}
bool
ABIMacOSX_i386::CreateDefaultUnwindPlan (UnwindPlan &unwind_plan)
{
uint32_t reg_kind = unwind_plan.GetRegisterKind();
uint32_t fp_reg_num = LLDB_INVALID_REGNUM;
uint32_t sp_reg_num = LLDB_INVALID_REGNUM;
uint32_t pc_reg_num = LLDB_INVALID_REGNUM;
switch (reg_kind)
{
case eRegisterKindDWARF:
fp_reg_num = dwarf_ebp;
sp_reg_num = dwarf_esp;
pc_reg_num = dwarf_eip;
break;
case eRegisterKindGCC:
fp_reg_num = gcc_ebp;
sp_reg_num = gcc_esp;
pc_reg_num = gcc_eip;
break;
case eRegisterKindGDB:
fp_reg_num = gdb_ebp;
sp_reg_num = gdb_esp;
pc_reg_num = gdb_eip;
break;
case eRegisterKindGeneric:
fp_reg_num = LLDB_REGNUM_GENERIC_FP;
sp_reg_num = LLDB_REGNUM_GENERIC_SP;
pc_reg_num = LLDB_REGNUM_GENERIC_PC;
break;
}
if (fp_reg_num == LLDB_INVALID_REGNUM ||
sp_reg_num == LLDB_INVALID_REGNUM ||
pc_reg_num == LLDB_INVALID_REGNUM)
return false;
UnwindPlan::Row row;
const int32_t ptr_size = 4;
unwind_plan.SetRegisterKind (eRegisterKindGeneric);
row.SetCFARegister (fp_reg_num);
row.SetCFAOffset (2 * ptr_size);
row.SetOffset (0);
row.SetRegisterLocationToAtCFAPlusOffset(fp_reg_num, ptr_size * -2, true);
row.SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, ptr_size * -1, true);
row.SetRegisterLocationToAtCFAPlusOffset(sp_reg_num, ptr_size * 0, true);
unwind_plan.AppendRow (row);
unwind_plan.SetSourceName ("i386 default unwind plan");
return true;
}
bool
ABIMacOSX_i386::RegisterIsVolatile (const RegisterInfo *reg_info)
{
return RegisterIsCalleeSaved (reg_info);
}
bool
ABIMacOSX_i386::RegisterIsCalleeSaved (const RegisterInfo *reg_info)
{
if (reg_info)
{
// Volatile registers include: ebx, ebp, esi, edi, esp, eip
const char *name = reg_info->name;
if (name[0] == 'e')
{
switch (name[1])
{
case 'b':
if (name[2] == 'x' || name[2] == 'p')
return name[0] == '\0';
break;
case 'd':
if (name[2] == 'i')
return name[0] == '\0';
break;
case 'i':
if (name[2] == 'p')
return name[0] == '\0';
break;
case 's':
if (name[2] == 'i' || name[2] == 'p')
return name[0] == '\0';
break;
}
}
}
return false;
}
void
ABIMacOSX_i386::Initialize()
{
PluginManager::RegisterPlugin (pluginName,
pluginDesc,
CreateInstance);
}
void
ABIMacOSX_i386::Terminate()
{
PluginManager::UnregisterPlugin (CreateInstance);
}
//------------------------------------------------------------------
// PluginInterface protocol
//------------------------------------------------------------------
const char *
ABIMacOSX_i386::GetPluginName()
{
return pluginName;
}
const char *
ABIMacOSX_i386::GetShortPluginName()
{
return pluginShort;
}
uint32_t
ABIMacOSX_i386::GetPluginVersion()
{
return 1;
}